Bowling pin core



FIG. 1 is a side elevational view of a bowling pin core showing my new design;

FIG. 2 is a first end elevational view as seen from the left end of FIG. 1 and showing my new design; and

FIG. 3 is a second end elevational view as seen from the end opposite that of FIG. 2 and showing my new design. 

The ornamental design for a bowling pin core, as shown and described. 